auto save

diy.py

+file1=open(r'C:\\Users\\user\\Desktop\\book.txt','w',encoding='utf-8')
+file1.write('小兰:12本\n')
+file1.write('小丽:11本\n')
+file1.write('李文:9本\n')
+file1.write('张伟:16本\n')
+file1.close()
\ No newline at end of file